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Novel heterogeneous identity alliance user reputation value transmission method based on ring signature technology

A technology of ring signature and reputation value, applied in the field of user reputation value transfer of heterogeneous identity alliance, can solve the problems of transfer, user behavior privacy exposure, trust value transfer and update process without more description, to ensure validity, The effect of protecting behavioral privacy

Active Publication Date: 2020-03-31
CHENGDU UNIV OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The subsystem in the identity federation cannot safely transmit the user's reputation value under the condition that the concealed behavior occurs in the subsystem
[0009] (2) In the prior art, although the trust evaluation has been studied in the topology of the heterogeneous identity federation, there is no further description of the transfer and update process of the trust value in each federation member
[0014] Once the source system is exposed, any system in the alliance can infer the user's behavior pattern through the change of the user's reputation value and the source system where it occurred, resulting in the exposure of the user's behavioral privacy

Method used

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  • Novel heterogeneous identity alliance user reputation value transmission method based on ring signature technology
  • Novel heterogeneous identity alliance user reputation value transmission method based on ring signature technology
  • Novel heterogeneous identity alliance user reputation value transmission method based on ring signature technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] The structure of the trust management system of heterogeneous identity federation is as follows: figure 2 shown. SP members provide various services to federation users. The service provider members (SP members) of the identity alliance are connected through a chain of trust based on blockchain technology, and only service provider members of the identity alliance can add new blocks to the trust chain.

[0101] When a user's trust value is updated, the service provider member of the corresponding identity federation will create a new block and add it to the end of the trust chain. An example of a chain of trust is image 3 shown.

[0102] The chain of trust consists of blocks connected in series. The nth block consists of four parts.

[0103] ·User identity information: the user who declares that the trust value will be modified.

[0104] Timestamp: is the timestamp of the time the block was added.

[0105] Signed trust value: The trust value calculated by the a...

Embodiment 2

[0115] The embodiment of the present invention provides a novel ring signature technology-based heterogeneous identity federation user reputation value transfer method, including:

[0116] (1) Initialization

[0117] Let k be the security parameter. Let a positive integer N be the product of two k-bit odd prime numbers (p and q). Choose a fixed value l, let e be a randomly selected positive integer, ie 2 l l+1 , less than calculate Define the hash function used for encryption as follows: H 1 : {0, 1} * → Z N * , H 2 : {0, 1} * → {0, 1} l .

[0118] The initial parameters of the final generation system = {k, l, N, e, H 1 , H 2}.

[0119] The system keys are: {p, g, d}.

[0120] (2) Key generation:

[0121] In this step, a public key-private key pair (SH i , H(ID i )) where SK i =(H(ID i )) d as ID i service provider members of the Alliance.

[0122] (3) signature

[0123] (3.1) Let U={ID 1 ,...,ID n}Provides a collection of member identity informatio...

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Abstract

The invention belongs to the technical field of network data processing, and discloses a novel heterogeneous identity alliance user reputation value transmission method based on a ring signature technology, and the method comprises the steps: the verifiable signature of an unexposed behavior generation system is carried out on a reputation value transmitted to other systems by a source system whenthe reputation value generated by the behavior of a user is updated; signing is carried out in a trust transfer process in the heterogeneous identity alliance by adopting a ring signature technology;the subsystem receiving the updated reputation value can simply verify the authenticity of the reputation value, but cannot obtain the information of the source system where the reputation value occurs. When each node executes trust value updating, modified information needs to be signed in a newly added block; the signature can ensure the validity of trust value updating because only members ofthe identity alliance have private keys for signature; the anonymity of the ring signature is helpful to hide the source member modifying the trust value of the user, thereby protecting the behavior privacy of the user.

Description

technical field [0001] The invention belongs to the technical field of network data processing, and in particular relates to a novel ring signature technology-based method for transferring reputation values ​​of heterogeneous identity federation users. Background technique [0002] Currently, the closest existing technology: heterogeneous identity federation is an emerging identity management system. Existing identity management systems exist primarily in silos. Existing identity management systems in which multiple systems share identities mainly use a central system to manage user identities, and such systems are called centralized systems. In a centralized system, the identity authenticated by the central system can be used in other subsystems, and the identity authenticated by the subsystem itself cannot be used universally. Since the traditional authentication system only manages the identity of one service provider, a user who is going to use the service needs to hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/08
CPCH04L9/3255H04L9/0825
Inventor 刘宁黄曦万武南张金全昌燕张仕斌
Owner CHENGDU UNIV OF INFORMATION TECH
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